Disk supporting and feeding mechanism for disk sharpeners



May 30, 1933. c. w. SKOW 1,912,166

D ISK SUPPORTING AND FEEDING MECHANISM FOR DISK SHARPENERS Filed Feb. 2, 1931 2 Sheets-Sheet 1 6 Z. 0%010 M+ AQ May 30, 1933. c w g ow 1,912,1fi6

DISK SUPPORTING MD FEEDING MECHANISM FOR DISK SHARPENERS Filed Feb. 2, 1931 2 Sheets-Sheet 2 Patented May 30, 1933 UNITED P ENT oiFF'Ic-s DISK sUrroRTinGi rnhriifii'd' MncH'AnrsM FOR :orsK seamstress The-object of this invention isto provide; in that type of disk Sharpeners employilig apair of enacting. r oll s: for drawing out the periphery of the dish to a thin edge for? disknray be stabilized and steadied to more accurately fern-r the sharpened eclgeuthan has heretoforebeen possible; especially when the" periphery of the disk has beennieke'd or unevenly worm More specifically 11;- is the object of this 1 invention to provide an improvedmecha;

nism' for" operating and controlling the disk holding means whereby the feeding suctiofi of the disk may be easily and quiek ly'increased or decreased at the will: of the op;

This invention: consists in the construc: tron, arrangement oomhination of the varies parts r the'devi'cd whereby the eb= jeets enntempl ated attained; as herein; miter more fully s'etforth; pointed out in my claims, and illustrated in the actors: panying drawings;- in V Fighte 1 is an and elevatio of a disk sharpener the lliiimeli which iinproved'holder is tliI-etO:

Figi' re 3 is aside'elevation of the'disls holder showing diagrannnaticaliy the net in which the disk-may be tilted relative to the pressure folds of the sharpen r.- 1

Figure 4; is a detail sectionalview-"taken ontheh fie as Figure 1. p Fig-life 538 adia rammatijarview' slihW-' ing the dish in solid lines in one position relative to the passure rolls; and by dhtted finest-Elie Hernia-real ties; Y s

Figure 6 is a; detail sectional View falieri on theli'ne 6 6of Fi-g'ure 1 a In the accom anying drawings-the referenee numeral- 10* indicates: base blocks de sighed to su pport the legs 11 o'fvthe frame 12', Said frame-- 152" is provided" with up wardly extending supports- 13) Said sup= ports 13 are provided with bearing blocks 1' shallterni'i a disk clamp.

If inwhich are rotatively mounted roller shafts 15 and 16, said shafts being rotated in opposite directions by means of suitable gear mechanism 17 of ordinary construction.

Pressure is applied to thetopsjhaft 16 by 5 means of a-scr'ew threadedjshaft 1 8 operated by means ofa leve -19. Qn the for-; ward end of the shaft 16 is aroller 2Q, and on the forward end of the shaft 15' is a, roller 21, said rollers being slightly tape-red in the manner illustrated in Figure 1;

The shafts ,15 and- 16 are mounted in a common vertical plane. Supported in the lower end of the forward mernber 13 is a block 22' in which is rotatably mounted stii bsha'ft 23 having its rearfend provided withqa' washer 24 and afhut 25' for securing said washeflr tothe rear end of th e shaft 23 The forward end of. the vshaf t"23j is providedwith an enlargedportion 26; The

members 24 and 26: provide nean's for preventing sliding movement of the shaft 23 in theiblOCk 22; 4 7 v y The forward end ofthe member 26 terminatesin a block-27, said block beingd'esigned to pivotally and slid'ably receive one end of a guide bar '28. Said guide bar28 is} provided with a guide 29, having a ,l'atera lly extending portion 30 in which is 1 rotatively nounted a shaft 31 terminating in ahead portion 32,- designedtoisupport thejcentral portion of a disk 33'; The said disk 33 is secured in position by means of a bolt-iikahdwashers 35; The shaft 3'1-issup; ported in front-"of the end of the shaft 16 and substantially in a common plane.

The parts- 30, 31,:34; and 35 constitute what Secured to the-[outer end of the bar 28 is ablock having a' downwardly extendin; portion 37; for recei'vinga' screw threaded shaft 38. The inner end; of the shaft 88 islrotatively mounted in a downwardly elitendingportion 39' from thevguide 29'. A crahk- 40is secured tothe outer end of the shaft 38'. i v

Rotation of the shaft 38 will cause the guide block 29 to" movelongitudinally of the bar 28 accommodatedisks of various diameters,in such a I'nanner that the periph- By this arrangement it will be seen that rotation of the turn-buckle 43 will cause the outer end of the guide bar 28 to be elevated or lowered, and the inclination of the shaft 31 varied relative to the axis of the shaft to accommodate disks of various curvatures.-

It will also be seen that the block is free to swinglaterally about the center of the shaft 23, causing the upper end of the shaft 31 to be titlted laterally andrelative to the common plane of the shafts 15 and 16, in such a. manner as to swing the center of the disk to a position laterally to one side 33 of the common plane of the shafts 15 and 16, as illustrated by solid lines in Figure 5, and thereby change the relative feeding angle of the periphery of the disk relative to the periphery of the pressure rollers, in such manner that if the upperend of the shaft 31 is swung laterally in one direction, the tendency to feed the disk radially into the rollers will be increased, while if the upper end of the shaft 31 is rotated in the opposite direction, the tendency to feed the periphery of the disk radially to position between the rollers will be decreased.

If the shaft 31 is titlted laterally to position in a common plane, then the tendency of the disk to be drawn into position between the pressure rolls or propelled therefrom will be substantially zero;

If the shaft 31 is tilted laterally in such a manner as to cause the disk to be fed into the rollers, then it will be seen that a strain is placed onthe shaft 31 tending to bend its upper end inwardly,causing the shaft 31 to operate firmly against its bearings, and thereby prevent any chattering or loosening in the movement of the disk, as the rollers 20 and 21 are rotated.

It will further be seen that a certain radial drawing action of the metal of the disk will also be encountered, which increases the tendency toward drawing the periphery of the disk to a thin edge, and increasing the speed of the sharpening action.

By placing the disk under an inwardly feeding strain, it will readily be seen that the beveled portion formed by the rollers 20 and 21 will be absolutely concentric to the center of the disk, inasmuch as the shaft is firmly supported in its bearings against inward and outward movement, so that the finished edge of the disk will be perfectly concentric with its center. This inward drawing action of the rollers is of particular advantage when sharpening disks having notched peripheries, as the disk is firmly held against inward and outward movement at the time the notch of the periphery passes between the rollers, which'would result if the'disk were fed between the rollers with no drawing action.

To accomplish the lateral swinging movement of the block 45, I have provided the following mechanism:

Pivotally secured to the upper surface of the rear one of the blocks 10 is a bracket 47 to which is pivotally connected a link 48, by means of a rivet '49. The forward end of the link 48 is pivotally connected to a rearwardly extendingportion 50 of :the

block 45, by means of a pivot 51. The link 48prevents forward and rearward movement of the block 45, and yet permits lat? eral swinging movement about the center of the shaft 23; J

Secured to one of the links 46 is abrace member 52, having its upper end connected to allever 53. One end of the lever 53 is secured to the block 27. The lever 53 provides means whereby the lateral swinging movement of the block 45 may be manually controlled, which in turn controls the lateral tilting movement of the shaft 31', above referred to.

By this arrangement it will readily be seen that the inward drawing action of the disk may be increased or decreased by elevating or lowering the free end of the lever 53, thereby providing'means wherebyv the drawing action of the rollers on the peripheryof the disk is always under the control of the operator to meet the required conditions.

I claim as my invention: 7 1. In a disk sharpener,'the combination of a support, a pair of coacting. pressure rolls, a rotatively mounted disk clamp having its axis substantially perpendicular to the axes of said rolls and substantially in. a common planetherewith, a frame for supporting said disk clamp, means for pivoting said. frame about an axis parallel with the I axes ofsaid rolls, saidframe including a downwardly extending portion, a horizontal link pivoted to the downwardly extending portion of said frame, means for pivoting one end of said link, and a laterally extend; ing handle for said pivoted frame.

2. In a disk sharpener, the combination of a support, a pair of coacting pressure rolls, a rotatively mounted diskclamp having its axis substantially in a common plane with the axes of said rolls, a frame for supporting said disk clamp, means for pivoting said frame about an'axis parallel with the axes of said rolls, said frame having a downwardly extending portion, a horizon tally arranged link having one end pivotally connected to the lower end of said downwardly extending portion and its 0pposite end pivotally connected to said support, and a handle for swinging said frame about its pivotal axis, substantially as and for the purposes stated.

3. In a disk sharpener, the combination of a support, a pair of coacting pressure rolls, a rotatively mounted disk clamp having its axis substantially perpendicular to the axes of said rolls and substantially in a common plane therewith, a frame for supporting said disk clamp, means for pivoting said frame to permit the frame to swing in a plane perpendicular to the axes of said rolls, and a handle for swinging said frame about its pivotal axis, substantially as and for the purposes stated.

CHRISTOPHER W. SKOW. 

